trominon.
/ˈtrɒmɪnəʊ/ Any planar shape formed by joining three identical squares by their edges.
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the world > relative properties > number > geometry > shape or figure > [noun] > two-dimensional > other
amblygon1570
obliquea1608
triangulate1610
pelecoid1706
leaf1716
oblongitude1739
hexagram1863
polystigm1863
tetragram1863
tetrastigm1863
trigram1882
tetromino1954
tromino1954
tetrabolo1961
Penrose tile1975
1954 Amer. Math. Monthly 61 676 It is impossible to cover the checker board with 21 straight trominoes, and a monomino in the upper left-hand corner of the board.
1961 New Scientist 2 Nov. 316/2 A domino is formed from two adjacent squares: he [sc. Golomb] argues that practical needs and false etymology will justify our calling a square a monomino—whence we have a series monomino, domino, tromino, tetromino.., and Maestro pieces then become pentominoes.
1979 Sci. Amer. Apr. 19/1 The games played with the two 3-cell animals (the trominoes) are slightly more difficult to analyze.
This entry has not yet been fully updated (first published 1986; most recently modified version published online March 2018).
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